{
  "url": "https://openlegislation.uk/eu-directive-1998-83/annex-III/part-B/division-1",
  "json_url": "https://openlegislation.uk/eu-directive-1998-83/annex-III/part-B/division-1.json",
  "legislation": "eudr/1998/83",
  "legislation_title": "Council Directive 98/83/EC of 3 November 1998 on the quality of water intended for human consumption",
  "legislation_url": "https://openlegislation.uk/eu-directive-1998-83",
  "path": "annex/III/part/B/division/1",
  "kind": "division",
  "number": "1",
  "heading": "Chemical and indicator parameters",
  "text": "For the parameters set out in Table 1, the specified performance characteristics are that the method of analysis used must, as a minimum, be capable of measuring concentrations equal to the parametric value with a limit of quantification, as defined in Article 2(2) of Commission Directive 2009/90/EC , of 30 % or less of the relevant parametric value and an uncertainty of measurement as specified in Table 1. The result shall be expressed using at least the same number of significant figures as for the parametric value considered in Parts B and C of Annex I.\nUntil 31 December 2019 Member States may allow for the use of ‘ trueness ’ , ‘ precision ’ and ‘ limit of detection ’ as specified in Table 2, as an alternative set of performance characteristics to ‘ limit of quantification ’ and ‘ uncertainty of measurement ’ as specified respectively in the first paragraph and Table 1.\nThe uncertainty of measurement laid down in Table 1 shall not be used as an additional tolerance to the parametric values set out in Annex I.\nTable 1\nMinimum performance characteristic ‘ Uncertainty of measurement ’\nAcrylamide, epichlorohydrin and vinyl chloride to be controlled by product specification.\nParameters\nUncertainty of measurement (See Note 1) % of the parametric value (except for pH)\nNotes\nAluminium\n25\nAmmonium\n40\nAntimony\n40\nArsenic\n30\nBenzo(a)pyrene\n50\nSee Note 5\nBenzene\n40\nBoron\n25\nBromate\n40\nCadmium\n25\nChloride\n15\nChromium\n30\nConductivity\n20\nCopper\n25\nCyanide\n30\nSee Note 6\n1,2-dichloroethane\n40\nFluoride\n20\nHydrogen ion concentration pH (expressed in pH units)\n0,2\nSee Note 7\nIron\n30\nLead\n25\nManganese\n30\nMercury\n30\nNickel\n25\nNitrate\n15\nNitrite\n20\nOxidisability\n50\nSee Note 8\nPesticides\n30\nSee Note 9\nPolycyclic aromatic hydrocarbons\n50\nSee Note 10\nSelenium\n40\nSodium\n15\nSulphate\n15\nTetrachloroethene\n30\nSee Note 11\nTrichloroethene\n40\nSee Note 11\nTrihalomethanes — total\n40\nSee Note 10\nTotal organic carbon (TOC)\n30\nSee Note 12\nTurbidity\n30\nSee Note 13\nTable 2\nMinimum performance characteristics ‘ Trueness ’ , ‘ precision ’ and ‘ limit of detection ’ — may be used until 31 December 2019\nAcrylamide, epichlorohydrin and vinyl chloride to be controlled by product specification.\nParameters\nTrueness (See Note 2) % of the parametric value (except for pH)\nPrecision (See Note 3) % of the parametric value (except for pH)\nLimit of detection (See Note 4) % of the parametric value (except for pH)\nNotes\nAluminium\n10\n10\n10\nAmmonium\n10\n10\n10\nAntimony\n25\n25\n25\nArsenic\n10\n10\n10\nBenzo(a)pyrene\n25\n25\n25\nBenzene\n25\n25\n25\nBoron\n10\n10\n10\nBromate\n25\n25\n25\nCadmium\n10\n10\n10\nChloride\n10\n10\n10\nChromium\n10\n10\n10\nConductivity\n10\n10\n10\nCopper\n10\n10\n10\nCyanide\n10\n10\n10\nSee Note 6\n1,2-dichloroethane\n25\n25\n10\nFluoride\n10\n10\n10\nHydrogen ion concentration pH (expressed in pH units)\n0,2\n0,2\nSee Note 7\nIron\n10\n10\n10\nLead\n10\n10\n10\nManganese\n10\n10\n10\nMercury\n20\n10\n20\nNickel\n10\n10\n10\nNitrate\n10\n10\n10\nNitrite\n10\n10\n10\nOxidisability\n25\n25\n10\nSee Note 8\nPesticides\n25\n25\n25\nSee Note 9\nPolycyclic aromatic hydrocarbons\n25\n25\n25\nSee Note 10\nSelenium\n10\n10\n10\nSodium\n10\n10\n10\nSulphate\n10\n10\n10\nTetrachloroethene\n25\n25\n10\nSee Note 11\nTrichloroethene\n25\n25\n10\nSee Note 11\nTrihalomethanes — total\n25\n25\n10\nSee Note 10\nTurbidity\n25\n25\n25",
  "extent": "E+W+S+N.I.",
  "status": null,
  "version": "current",
  "annotations": [
    {
      "type": "F",
      "label": "F1",
      "text": "Substituted by Commission Directive (EU) 2015/1787 of 6 October 2015 amending Annexes II and III to Council Directive 98/83/EC on the quality of water intended for human consumption."
    },
    {
      "type": "footnote",
      "label": "f1",
      "text": "Commission Directive 2009/90/EC of 31 July 2009 laying down, pursuant to Directive 2000/60/EC of the European Parliament and of the Council, technical specifications for chemical analysis and monitoring of water status ( OJ L 201, 1.8.2009, p. 36 )."
    }
  ],
  "outstanding_effects": [],
  "provenance": {
    "source": "legislation.gov.uk",
    "source_url": "https://www.legislation.gov.uk/eudr/1998/83/annex/III/part/B/division/1",
    "retrieved_at": "2026-11-01T15:23:05.963553+00:00"
  },
  "licence": "Open Government Licence v3.0",
  "licence_url": "https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/",
  "attribution": "Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives."
}